<template>
    <div class='list' ref='wrapper'>
        <div>
            <div class='area'>
                <div class='title border-topbottom'>当前城市</div>
                <div class='button-list'>
                    <div class='button-wrapper'>
                        <div class='button'>
                            {{this.currentCity}}
                        </div>
                    </div>
                </div>
            </div>
            <div class='area'>
                <div class='title border-topbottom'>热门城市</div>
                <div class='button-list'>
                    <div class='button-wrapper' v-for='item of hot' :key='item.id' @click='handleCityClick(item.name)'>
                        <div class='button'>
                            {{item.name}}
                        </div>
                    </div>
                </div>
            </div>
            <div class='area' v-for='(item, key) of cities' :key='key' :ref='key'>
                <div class='title border-topbottom'>
                    {{key}}
                </div>
                <div class='item-list'>
                    <div class='item border-bottom' v-for='innerItem of item' :key='innerItem.id' @click='handleCityClick(innerItem.name)'>
                        {{innerItem.name}}
                    </div>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
import { mapState, mapMutations } from 'vuex'
import Bscroll from 'better-scroll'
export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  methods: {
    handleCityClick (city) {
      this.chageCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['chageCity'])
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  }
}
</script>

<style lang='stylus' scoped>
@import '~styles/varibles.styl'
.border-topbottom
    &:before
        border-color: #ccc
    &:after
        border-color: #ccc
.border-bottom
    &:before
        border-color: #ccc
.list
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    .title
        line-height: .54rem
        background: #eee
        padding-left: .2rem
        color: #666
        font-size: .26rem
    .button-list
        overflow: hidden
        padding: .1rem .6rem .1rem .1rem
        .button-wrapper
            float: left
            width: 33.33%
            .button
                margin: .1rem
                padding: .1rem 0
                text-align: center
                border: .02rem solid #ccc
                border-radius: .06rem
    .item-list
        .item
            line-height: .76rem
            color: #666
            padding-left: .2rem
</style>
